Building an SES Boiler

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Toymaker

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My goal is to build a clone, or close copy, of the SES boiler-burner assembly. I'll present all the data I have on this unit, starting with a few specs:

Steam output: 1000 F at 1000 psi.
Steam flow range: 27 to 550 kg/hr (60 to 1200 lbs/hr)
Fuel flow: 1.8 to 45 kg/hr (4-100 lb/hr)
Burner’s firing rate: 640 kW = 864 hp
Burner Efficiency: 77%

In the late 1960s to mid 1970s, Scientific Energy Systems, or SES, designed, built, and tested a low emissions Rankine cycle automotive steam engine, which of course included a rather compact, powerful monotube boiler-burner. Below is the best photo of the boiler I've been able to find:
Boiler Burner photo.JPG


In order to fully vaporize the fuel, a small amount of hot exhaust gases are vented into the fresh air intake, raising intake air temperature up to approx 300 F. Finely atomized fuel is sprayed into the hot intake air which is drawn into the blower fan which further mixes the fuel and air. By the time the fuel-air mix reaches the Merker style burner plate, all the fuel is in a gaseous state. Below is a cross-section view:
SES Boiler-Burner.png


Below are the stainless steel boiler tubes.
Boiler tubes inside.jpg
Boiler tubes outside.jpg


I'm currently working towards making the blower impeller shown below. Both the base and shield will be fabricated using a metal spinning technique,...should be interesting as I've never done this before.
Inlet Diameter - 12.7 cm (5 In)
Discharge Diameter - 22.9 cm (9 In)
Discharge Blade Height - 2.3 cm (0.90 In)

Blower Impeller.png
 

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